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Rats! is a parser generator for C-like languages (currently only Java) that has been designed so that grammars are concise and easily extensible. It relies on ordered choices to avoid ambiguities, supports syntactic predicates for unlimited lookahead, and integrates lexing with parsing. It also supports automatically generating abstract syntax trees, thus greatly reducing the need for explicit semantic actions.

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LicenseVerified byVerified onNotes
GPLv2orlaterJanet Casey10 September 2004

Leaders and contributors

Robert Grimm Maintainer

Resources and communication

Audience Resource type URI
Bug Tracking,Developer,Support E-mail

Software prerequisites

This entry (in part or in whole) was last reviewed on 18 August 2005.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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